/**
 * Copyright [2012-2013] [Guðmundur Björn Birkisson]
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. Copyright [2012-2013] [Guðmundur Björn Birkisson]
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * ---------------------------------------------------------------------------
 * 
 * Class name:  RDGoCounter
 * 
 * Description of class:
 * 
 * Helper class to handle go count for morpho VM
 * 
 */


package karel.lang.newParserTools;

public class RDGoCounter {
    
    private int target;
    
    private static RDGoCounter instance;
    
    public static RDGoCounter getInstance() {
        if(RDGoCounter.instance == null) {
            RDGoCounter.instance = new RDGoCounter();
        }
        return RDGoCounter.instance;
    }
    
    public static void reset() {
        instance = null;
    }
    
    private RDGoCounter() {
        target = 0;
    }
    
    public int push() {
        return target++;
    }
}
